scholarly journals ANALISIS KANDUNGAN FOSFOR PADA TANAH SAWAH DAN BERAS DI DESA WOLOAU KECAMATAN MAUROLE KABUPATEN ENDE

AGRICA ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 34-42
Author(s):  
Angelia Nia Dhasa ◽  
Charly Mutiara
Keyword(s):  
Soil Ph ◽  
Survey Method ◽  
Rice Varieties ◽  
Soil P ◽  
P Content ◽  
Low Efficiency ◽  
Ph Scale ◽  
Very High ◽  
Total P

High phosphorus (P) content and continuous fertilization cause P saturation, nutrient imbalance in the soil, low efficiency, and the possibility of other nutrients such as Zn becomes unavailable. Therefore it is necessary to research to determine the content of phosphorus in rice fields and rice in Woloau Village, Maurole District, Ende Regency. This study uses a survey method, where the determination of soil samples done by a purposive method. With this method, three hamlets were obtained, which cultivated Ciherang and Inari rice varieties. The main variables observed were available P and total soil P, P in rice. The supporting variables are C-Organic and soil pH. C-Organic is a percentage of fertility in the soil consisting of various C (carbon) bonds. The soil pH is the acidity or basicity of an object measured on a pH scale between 0 to 14. The results of research this show that the mainstay of P is available in paddy soils, namely 96.49 ppm, 101.9 ppm, 97.99 ppm, 98.32 ppm, 95.01, and TC3 99.11 ppm with very high criteria. The total P content in paddy soil is 177.54 ppm, 208.39 ppm, 192.61 ppm, 163.21 ppm, 161.99 ppm, 175.92 ppm with very high criteria. The P content in rice is 1201.88 ppm, 1197.34 ppm, 1230.11 ppm, 1231.23 ppm, 1240.51 ppm, 1248.09 ppm.

scholarly journals Modifications of phosphorus in Latosol as a function of humic acids and acidity

2018 ◽  
Vol 22 (7) ◽  
pp. 488-492 ◽  
Author(s):  
Márcia H. Beck ◽  
Pedro A. V. Escosteguy ◽  
Deborah P. Dick
Keyword(s):  
Factorial Design ◽  
Humic Acids ◽  
Soil Ph ◽  
Crucial Role ◽  
Soil Acidity ◽  
Ph Value ◽  
P Availability ◽  
Soil P ◽  
P Content

ABSTRACT The effect of humic acids (HA) on phosphorus (P) availability is still contradictory; thus, it is necessary to identify the conditions that play a crucial role in this effect. The aim of this study was to investigate the effect of HA application, combined with doses of P, on the content of this nutrient in a Latosol with and without acidity correction. Two experiments were carried out, one with HA from peat and another with HA from mineral charcoal (leonardite). Doses of these acids (0; 1.12 and 5.62 mg C g-1 of soil) and P (26.2 and 104.7 mg P g-1 of soil, 1 and 4-fold higher than recommended, respectively) were tested at soil pH 4.5 and 7.0, in a three-factorial design. The soil was incubated for 20 days and the soil-P content was measured by Mehlich-1 and remaining-P tests. The effect of HAs on P availability varied with the P doses and soil acidity. Humic acids application increases P content in Latosol when P dose is higher than recommended and there is no acidity correction (pH 4.5). However, there is no effect of HAs application on soil-P content when applying the recommended amount of this nutrient, irrespective of the pH value.

Soil phosphorus depletion capacity of arbuscular mycorrhizae formed by maize hybrids

2003 ◽  
Vol 83 (4) ◽  
pp. 337-342 ◽  
Author(s):  
A. Liu ◽  
C. Hamel ◽  
S. H. Begna ◽  
B. L. Ma ◽  
D. L. Smith
Keyword(s):  
Plant Biomass ◽  
Arbuscular Mycorrhizal ◽  
Am Fungi ◽  
P Uptake ◽  
Maize Hybrids ◽  
Soil P ◽  
Extractable P ◽  
P Content ◽  
Total P ◽  
Extractable Soil

The ability of arbuscular mycorrhizal (AM) fungi to help their host plant absorb soil P is well known, but little attention has been paid to the effect of AM fungi on soil P depletion capacity. A greenhouse experiment was conducted to assess, under different P levels, the effects of mycorrhizae on extractable soil P and P uptake by maize hybrids with contrasting phenotypes. The experiment had three factors, including two mycorrhizal treatments (mycorrhizal and non-mycorrhizal), three P fertilizer rates (0, 40, and 80 mg kg-1) and three maize hybrids [leafy normal stature (LNS), leafy reduced stature (LRS) and a conventional hybrid, Pioneer 3979 (P3979)]. Extractable soil P was determined after 3, 6 and 9 wk of maize growth. Plant biomass, P concentration and total P content were also determined after 9 wk of growth. Fertilization increased soil extractable P, plant biomass, P concentration in plants and total P uptake. In contrast to P3979, the LNS and LRS hybrids had higher biomass and total P content when mycorrhizal. Mycorrhizae had less influence on soil extractable P than on total P uptake by plants. The absence of P fertilization increased the importance of AM fungi for P uptake, which markedly reduced soil extractable P under AM plants during growth. This effect was strongest for LNS, the most mycorrhizae-dependent hybrid, intermediate for LRS, and not significant for the commercial hybrid P3979, which did not respond to AM inoculation. Key words: Arbuscular mycorrhizal fungi, extraradical hyphae, maize hybrid,plant biomass, P uptake, soil extractable P

scholarly journals Pengaruh Sertifikasi Terhadap Keterampilan Guru Dalam Pembuatan Rencana Pelaksanaan Pembelajaran

2019 ◽  
Vol 2 (1) ◽  
pp. 238
Author(s):  
Aulia Akbar
Keyword(s):  
Learning Activities ◽  
Survey Method ◽  
Careful Planning ◽  
Certified Teachers ◽  
Effective Learning ◽  
Learning Plan ◽  
Teacher Skills ◽  
Implementation Plans ◽  
Very High

<em><span>Effective learning activities require careful planning. When planning the learning activities to be carried out must consider a variety of variables, ranging from the determination of models, methods, tools, evaluation instruments and others in part. This is not easy, it requires extensive and in-depth knowledge in making a learning plan. However, Learning Implementation Plans (RPP) skill making is a skill that must be possessed by every teacher, especially teachers who are already certified. Certified teachers should already have four expected competencies, including: pedagogical, personal , social and professional . So that learning activities in class can run in accordance with what is desired . The purpose of this study is to obtain a picture of whether certification has an effect on teacher skills in making learning implementation plans. Adapu n method used is a survey method using a random sample of eight teachers. The instrument in this study uses scoring / points on the nine principles contained in the 2013 curriculum preparation principles. The results obtained are based on the results of the study being in the very high category. Even though the principles in formulating lesson plans are not yet fully understood. Both certified and non-certified teachers were on average 8.75 or 97.22%.</span></em>

scholarly journals Assessment of Soil and Crop Qualities under Different Management Systems around Lokoja Metropolis, Central Nigeria

2020 ◽  
pp. 13-25
Author(s):  
S. D. Musa ◽  
S. O. Amhakhian ◽  
H. O. Abu
Keyword(s):  
Heavy Metals ◽  
Chemical Properties ◽  
Management Systems ◽  
High K ◽  
P Content ◽  
Significant Difference ◽  
Kg Medium ◽  
Very High

Soil quality is an essential factor in Agricultural sustainability and its combination with water and human factors substantially determine the quality of the output (crop) within a particular ecosystem. The goal was attained through: identification of the extant management systems; determination of some key properties in the soil, water and vegetable in the area; comparison of the heavy metals content of plants and soil to confirm whether the concentration of metals in soil is in available form for plant uptake. A total of twenty farm plots were sampled randomly at both upland and lowland areas. Soil, plant and water samples were collected and tested for both micro and macro elements. The results of the analysis revealed that the soils possess moderately acidic pH (6.0) with permissive rate of EC (0.45 mm hos/cm), low N (0,08%), very high P content (27.1 mg/kg), very high values of OC (1.65%), cation exchange indicates low levels of Na (0.2 cmol/kg), medium Ca (6.0 cmol/kg), very high K (3.7 cmol/kg), high Mg (4.3 cmol/kg), medium ECEC (16.0 cmol/kg) using FAO 2006. The results of the water analysis show that Cd, Fe, Pb and Mn are within the recommended threshold while Cu, Ni, Zn are above the threshold. No significant difference in the following soil chemical properties: pH, EC, %OC, %TN, Na, K, Mg, Ca, TEB, Exchange acidity, ECEC, Cu and Ni. Conversely, Fe, Mn, Zn, Pb and Cd show significantly higher value between the lowland and upland areas. Upland areas show significantly higher values in few heavy metals. It was concluded that regular monitoring of the macro and micro elements is critical to sustainable productivity.

scholarly journals Pengelolaan dan Pemupukan Fosfor dan Kalium pada Pertanian Intensif Bawang Merah di Empat Desa di Brebes

2018 ◽  
Vol 9 (1) ◽  
pp. 27-37
Author(s):  
Muliana , ◽  
Syaiful Anwar ◽  
Arief Hartono ◽  
Anas D. Susila ◽  
Supiandi Sabiham
Keyword(s):  
Nutrient Availability ◽  
Rainy Season ◽  
Smallholder Farmers ◽  
Nutrient Status ◽  
Soil Samples ◽  
Survey Method ◽  
Nutrient Accumulation ◽  
Soil P ◽  
Soil K Status ◽  
Very High

ABSTRACTThe management and fertilization of shallot cultivation in Brebes is very intensive. The purpose of this research was to study crop management and phosphorus (P) and potassium (K) fertilizations of shallot cultivation by smallholder farmers in four villages in Brebes. The data were collected through survey method, interview, and questionnaires to 14 respondent farmers, and analysis of P and K content of farmer's soil samples. The results showed that the cropping index (IP) was 400-500% comprised of three to four times of shallot cultivation and one rice cultivation. The fertilizations of P and K were 22-171 kg of P2O5 ha-1 and 22-213 kg K2O ha-1, respectively, while the recommended rates were 54 kg P2O5 ha-1 and 78 kg K2O ha-1, respectively. This varied fertilizations were not significantly correlated with productions, except fertilization of K with production in rainy season that was significantly correlated at P < 0.05 (n = 14, r = 0.532). The soil P status was very high at all locations and at all depths (0 - 80 cm), while the soil K status ranged from medium to very high. Keywords: nutrient accumulation, nutrient availability, nutrient residue, nutrient status, smallholder farmersABSTRAKPengelolaan dan pemupukan pada budidaya bawang merah di Brebes sangat intensif. Tujuan penelitian ini ialah mengkaji pengelolaan pertanaman dan pemupukan fosfor (P) dan kalium (K) bawang merah yang dilakukan petani di empat desa di Brebes. Pengumpulan data dilaksanakan melalui metode survei, wawancara, dan pengisian kuisioner kepada 14 petani responden, dan analisis kadar P dan K sampel tanah lahan petani responden. Hasil penelitian menunjukkan bahwa indeks pertanaman (IP) adalah 400-500% dengan pertanaman bawang merah tiga sampai empat kali dan satu kali pertanaman padi. Pemupukan P dan K berturut-turut berkisar 22–171 kg P2O5 ha-1 dan 22–213 kg K2O ha-1, sementara rekomendasi Distan Brebes berturut-turut adalah 54 kg P2O5 ha-1 dan 78 kg K2O ha-1. Pemupukan bervariasi ini tidak berkorelasi nyata dengan produksi, kecuali pemupukan K dengan produksi pada musim hujan yang berkorelasi nyata pada taraf 5% (n=14, r=0.532). Status P tanah sangat tinggi pada semua lokasi dan pada semua kedalaman (0 – 80 cm), sementara status K tanah lebih bervariasi, yaitu dari sedang sampai sangat tinggi.Kata kunci: akumulasi hara, ketersediaan hara, petani kecil, residu hara, status hara

scholarly journals PENGKAJIAN PEMUPUKAN FOSFOR (P) DAN KALIUM (K) BERDASARKAN STATUS HARA PADA TANAH DI DAERAH PERTANAMAN JAGUNG DI KABUPATEN PASAMAN BARAT

Jurnal Solum ◽  
2007 ◽  
Vol 4 (2) ◽  
pp. 40
Author(s):  
Yulinar Zubaidah
Keyword(s):  
Water Content ◽  
Soil Depth ◽  
Dry Weight ◽  
Soil Samples ◽  
Survey Method ◽  
Soil P ◽  
High K ◽  
P Content ◽  
Soil Status ◽  
Low K

Analysis of phosphorous (P) and potassium (K) fertilization based on soil P and K status at maize planting area in Pasaman Barat regency had done on October until December 2005. The research was conducted by using survey method.  The area was surveyed through some trails.  Soil samples were taken in every 500 – 1000 m in distance.  Global Position System (GPS) was used to determine the coordinates of sampling points.  In each point composite bulk soil samples were taken on the top 20 cm soil depth.  Each sample represented about 50 ha area.  The results showed that from 7702.2 ha area surveyed, there was 5351.5 ha (69.4%) of the area having high P content, 1487.5 Ha (19,3 %) having moderate P, and 863.2 Ha (11,2 %) having low P.  Potassium status of the soil in the area was as follows, 2798.4 Ha (36,3 %) having high K, 4499.4 Ha (58,4 %) having moderate K, and 404.4 Ha (5,2 %) having low K. The requirement of SP-36 fertilizer was about 90 kg/Ha, 250 kg/Ha and 500 kg/Ha, for soil having high P, moderate P, and low P content. Potassium was required about 0 kg KCl/Ha, 50 kg KCl/Ha and 250 kg KCl/Ha, for soil having high K, moderate K, and low K, respectively.  The both fertilization recommendation was the amount of SP36 and KCl to reach production about 4,5 ton dry weight corn kernel  (with water content 14%) or it is equal to 8 ton corn weight during harvesting time (with water content 25%).Key Words: P- soil status, K-soil status, fertilizer recommendation

Stratification, forms, and mobility of phosphorus in the topsoil of a Chromosol used for dairying

Soil Research ◽  
2006 ◽  
Vol 44 (3) ◽  
pp. 277 ◽  
Author(s):  
W. J. Dougherty ◽  
D. M. Nash ◽  
D. J. Chittleborough ◽  
J. W. Cox ◽  
N. K. Fleming
Keyword(s):  
Soil Phosphorus ◽  
South Australia ◽  
Subsequent Development ◽  
Exponential Relationship ◽  
Soil P ◽  
Mobile Forms ◽  
Extractable P ◽  
P Content ◽  
The Relationship ◽  
Total P

The forms and stratification of soil phosphorus (P) and their relationship to mobile forms of P were investigated in soils collected from a subcatchment used for grazing of dairy cattle in the Adelaide Hills, South Australia. Phosphorus in the soils was highly stratified. The concentration of calcium chloride extractable P in the 0–0.01 m increment was, on average, 5.7 times greater than in the 0.05–0.10 m increment. Organic P (% of total P) in the top 0.01 m was significantly (P < 0.001) related to soil P content such that low P soils (total P of ~600 mg/kg) had high proportions of Po (~65%), whereas high P soils (total P of ~2000 mg/kg) had low proportions (~25%) of Po. Runoff P from these soils was predominantly (86%) dissolved (i.e. <0.45 μm). There was a significant (P < 0.001) exponential relationship between Olsen P in the top 0.01 m and dissolved P concentration in runoff. The form of dissolved P in runoff from soil in repacked trays was also significantly (P < 0.001) related to soil P. Runoff from low P soils (high Po) had high proportions (>50%) of dissolved unreactive P (DUP), whereas runoff from high P soils (low Po) had low proportions of DUP (<10%). Ultrafiltration of runoff samples revealed that 94 and 65% of the dissolved reactive P and DUP, respectively, was subcolloidal (i.e. <1 nm). These results highlight the relationship between soil fertility, the forms of soil P, and the concentrations and forms of P mobilised in runoff. Such relationships need to be considered in further studies of P mobilisation and the subsequent development of strategies designed to reduce runoff P concentrations.

scholarly journals Pengaruh Tinggi Tempat dan Tipe Tanaman Padi terhadap Keparahan Penyakit Hawar Pelepah

2015 ◽  
Vol 33 (1) ◽  
pp. 1
Author(s):  
B. Nuryanto ◽  
A. Priyatmojo ◽  
B. Hadisutrisno
Keyword(s):  
Relative Humidity ◽  
Disease Severity ◽  
Soil Ph ◽  
High Elevation ◽  
Survey Method ◽  
Rice Varieties ◽  
The Road ◽  
Central Java ◽  
Soil Conductivity ◽  
Short Type

Sheath blight severity had been evaluated in the rice-producing centers of Central Java (along the road of Cilacap to Wonosobo) and Yogyakarta (along the road from Bantul to Sleman). Observations of the disease severity by survey method were conducted at farmers’ fields. The objects of the observation areas were organized in a split plot design with 5 replications. The main plots were the elevation levels, grouped into three strata: 1) 0-200m, 2) 200-500m, and 3) 500-700m above sea level; the subplots were rice varietal types, which were separated into: 1) short type many tillers, 2) tall type with few tillers. The results showed that environment elevations and plant types of rice varieties significantly affected the disease severity. Compared to the lowland (0-200m), the high elevation environment (500-700m) decreased the disease severity around 25% at both Central Java and Yogyakarta, while compared with the short type many tiller rice varieties, the use of tall type few tiller rice varieties decreased the disease severity of around 10% in Central Java and in Yogyakarta. Increasing soil conductivity of about 1 milly Siemens/cm caused decreasing in disease severity up to 32.9%. Every 1 scale soil pH increase, caused a decrease in disease severity up to 2.4%. Ambient temperature increased by 1 °C caused the disease severity by 4.0% and an increase of 1% relative humidity lead to an increase of disease severity by 2.3%. In general, increases of soil conductivity and soil pH caused a decrease in disease severity, while increases in temperature and relative humidity of the environment under rice plant canopy resulted in the increase of disease severity.

scholarly journals The nutrient content of N, P, K in Andisols and Arabica coffee leaves in Bener Meriah Regency, Indonesia

2022 ◽  
Vol 951 (1) ◽  
pp. 012014
Author(s):  
Hifnalisa ◽  
A Karim ◽  
Y D Fazlina ◽  
Manfarizah ◽  
Y Jufri ◽  
...  
Keyword(s):  
Total Content ◽  
Nutrient Content ◽  
Survey Method ◽  
Total N ◽  
Coffee Tree ◽  
Arabica Coffee ◽  
Nutrient Contents ◽  
Soil P ◽  
P Content ◽  
Close Relationship

Abstract Bener Meriah Regency is one of the arabica coffee areas in Indonesia. Generally, most of arabica coffees are grown in Andisols. This research aims to determine the nutrient content of N, P, K in andisols and arabica coffee leaves in the Bener Meriah regency. Data were collected from a 10-year-old arabica coffee tree planted on Andisols located at an altitude of 1200-1400 m above mean sea level and divided in five classes with different slopes, using the survey method and analysed descriptively. The results showed that andisols Bener Meriah had a total N content ranging from 0.09-0.51%. The P-available ranged from 0.3-12.81 mg.kg-1 and P-total content of 159.4-1246.7 mg.kg-1. The K-exchangeable content ranged from 0.17-0.52 cmol kg-1. Arabica coffee leaves contain N ranging from 0.85%-3.00%. The P content ranged from 0.10%-0.23%. Meanwhile, the K content ranged from 1.55%-2.33%. Furthermore, there is a close relationship between soil N-total and the N-nutrient of coffee leaves, soil P-available and P-nutrient of coffee leaves, and soil K-exchangeable and K nutrient contents of coffee leaves with r values of 0.78, 0.97, and 0.68 respectively.

Sign in / Sign up

Export Citation Format

Share Document