Suitability of the SPAD meter and the petiole nitrate test for nitrogen management in nursery potatoes

2001 ◽  
pp. 716-717 ◽  
Author(s):  
J. Gerendás ◽  
I. Pieper
Keyword(s):  
Nitrogen Management ◽  
Spad Meter

scholarly journals Precision nitrogen management in drip irrigated maize (Zea mays L.)

2019 ◽  
Vol 117 ◽  
pp. 00010
Author(s):  
Yogananda Shivalli Boregowda ◽  
Thimmegowda Puttavenkategowda ◽  
Prakash Salekoplu Sannegowda ◽  
Shruthi Goravale Kempegowda
Keyword(s):  
Block Design ◽  
Growth Yield ◽  
Nitrogen Management ◽  
Growth And Yield ◽  
Net Returns ◽  
Matter Production ◽  
Stover Yield ◽  
Normal Spacing ◽  
Colour Chart ◽  
Spad Meter

The field experiment was conducted during kharif 2014 and 2015 at ZARS, V. C. Farm, Mandya to study the effect of precision nitrogen management on growth, yield and economics of drip irrigated maize. There were 9 treatments replicated thrice in Randomized Complete Block Design. Among the various treatments, drip fertigation of nitrogen through Soil Plant Analysis Development (SPAD) meter sufficiency index of 95-100 per cent under paired row (30/90) recorded significantly higher growth and yield parameters viz., plant height, LAI, total dry matter production, cob length, number of rows per cob, number of kernels per cob and cob weight along with kernel (85.73 and 86.78 q/ha) and stover yield (140.4 and 145.3 q/ha) during both the years of experimentation as compared to UAS Bangalore package with surface irrigation and normal spacing of 60 cm X 30 cm and was being on par with nitrogen management through Leaf Colour Chart (LCC) 6, SPAD sufficiency index of 90-95 per cent and LCC 5. The SPAD sufficiency index of 95-100 per cent registered higher net returns (Rs. 69,634 and Rs. 77,614, respectively) and B:C ratio (2.82 and 3.00, respectively) followed by LCC 6.

scholarly journals Effect of Real time nitrogen management on yield attributes of direct seeded rice by using SPAD meter and Greenseeker

2021 ◽  
Author(s):  
saishree HALLE ◽  
SABYASACHI BISWAL ◽  
BOYAPATI RAVI TEJA NAIDU ◽  
REDDYYAMINI BOMMISETTY
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Block Design ◽  
Rice Variety ◽  
Threshold Value ◽  
Nitrogen Management ◽  
Yield Attributes ◽  
Randomized Block Design ◽  
Direct Seeded ◽  
Spad Meter

A field experiment was conducted during Kharif 2018, laid out in Randomized Block Design with three replications having seven treatments viz. N omission (T1), N applied as basal and AT (T2), N as basal, AT and PI (T3), N as basal and top dressing at NDVI threshold of 0.75 (T4), at NDVI threshold of 0.8 (T5), at SPAD threshold of 35.0 (T6) and SPAD threshold of 37.5 (T7) with Rice variety Sahabhagidhan.The study revealed that application of 30 kg N/ha as basal dose and top dressing of 20 kg N/ha twice at 35 and 63 DAS guided by NDVI threshold value of 0.8 (T5) was found to be superior over other treatments with respect to productivity. T5 recorded highest grain yield of 4438 kg/ha which was 17.0% higher than that top dressed at NDVI threshold of 0.75 (T4) and 7.1% higher than that top dressed at SPAD threshold value of 37.5 (T7). In case of SPAD meter, nitrogen top dressed at threshold value of 37.5 (T7) produced grain yield of 4143 kg/ha which was 15.0% higher than T6. T5 produced maximum dry matter of 8678 kg/ha with highest grain yield (4438 kg/ha), straw yield (5092 kg/ha) and harvest index 46.0%.

scholarly journals Precision Nitrogen Management for Enhancing Yield and Quality of Fodder Maize

2021 ◽  
pp. 236-241
Author(s):  
Zahida Rashid ◽  
N. S. Khuroo ◽  
Tanveer Ahmad Ahngar ◽  
Shabeena Majid ◽  
Sabiya Bashir ◽  
...  
Keyword(s):  
Growth Parameters ◽  
Block Design ◽  
Critical Value ◽  
Nitrogen Management ◽  
Research Station ◽  
Dry Land ◽  
Forage Maize ◽  
Randomized Block Design ◽  
Fodder Yield ◽  
Spad Meter

A field experiment was conducted during Kharif 2020 at Dry land Agriculture Research Station, Rangreth, Srinagar, Kashmir on Precision Nitrogen Management for enhancing fodder yield and nitrogen use efficiency in forage maize variety SFM-1 (KDFM-1) planted in a spacing of 30 x10 cm. The treatments consisted of T1 (No N), T2 50 kg N/ha (40% N basal) + remaining based on SPAD meter critical value of 40, T3  50 kg N/ha (40% N basal) + remaining based on SPAD meter critical value of 50, T4  50 kg N/ha (40% N basal) + remaining based on LCC 4, T5 50 kg N/ha (40% N basal) + remaining based on LCC 5, T6 100 kg N/ha (40% N basal) + remaining based on SPAD meter critical value of 40, T7 100 kg N/ha (40% N basal) + remaining based on SPAD meter critical value of 50, T8 100 kg N/ha (40% N basal) + remaining based on LCC 4, T9 100 kg N/ha (40% N basal) + remaining based on LCC 5, T10 150 kg N/ha (40% N basal) + remaining based on SPAD meter critical value of 40, T11  150 kg N/ha (40% N basal) + remaining based on SPAD meter critical value of 50, T12 150 kg N/ha (40% N basal) + remaining based on LCC 4, T13150 kg N/ha (40% N basal) + remaining based on LCC 5, T14   As per recommended package of practices (50% N as basal, remaining 50% at 30 days after sowing).The treatments were replicated thrice in a randomized block design. The results recorded during the year indicated that production of fodder maize was better with the treatment T13 (150 kg N/ha (40% N basal) + remaining based on LCC 5.  It recorded 470.01 q green and 135.02 q dry matter yield per hectare.  The growth parameters namely; plant height; number of leaves per plant and quality were also improved with this treatment as compared to other treatments.

Effect of In-Season Nitrogen Management Strategy on Maize Grain Yield and Nitrogen Use Efficiency

2011 ◽  
Vol 37 (1) ◽  
pp. 152-157 ◽  
Author(s):  
You-Liang YE ◽  
Yu-Fang HUANG ◽  
Chun-Sheng LIU ◽  
Ri-Tao QU ◽  
Hai-Yan SONG ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Management Strategy ◽  
Nitrogen Management ◽  
Nitrogen Use ◽  
Maize Grain Yield ◽  
Use Efficiency ◽  
Maize Grain

Effects of different nitrogen management models on agronomic characters and nitrogen fertilizer utilization efficiency of early rice

2010 ◽  
Vol 36 (2) ◽  
pp. 224-228
Author(s):  
Jian-wei PENG ◽  
Zhe-li DING ◽  
Qiang LIU ◽  
Xiang-min RONG ◽  
Chang TIAN ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Nitrogen Management ◽  
Utilization Efficiency ◽  
Agronomic Characters ◽  
Management Models ◽  
Early Rice

Concepts and Practices for Improving Nitrogen Management for Vegetables

1992 ◽  
Vol 2 (1) ◽  
pp. 121-125 ◽  
Author(s):  
George J. Hochmuth
Keyword(s):  
Water Management ◽  
Management Practices ◽  
Management Strategies ◽  
N Fertilization ◽  
Nitrogen Management ◽  
Land Grant ◽  
Land Grant Universities ◽  
Production Practices ◽  
Negative Impacts ◽  
N Management

Efficient N management practices usually involve many potential strategies, but always involve choosing the correct amount of N and the coupling of N management to efficient water management. Nitrogen management strategies are integral parts of improved production practices recommended by land-grant universities such as the Institute of Food and Agricultural Sciences, Univ. of Florida. This paper, which draws heavily on research and experience in Florida, outlines the concepts and technologies for managing vegetable N fertilization to minimize negative impacts on the environment.

Tiller Contribution to Spring Wheat Yield under Varying Seeding and Nitrogen Management

2008 ◽  
Vol 100 (2) ◽  
pp. 406 ◽  
Author(s):  
B. N. Otteson ◽  
M. Mergoum ◽  
J. K. Ransom ◽  
B. Schatz
Keyword(s):  
Spring Wheat ◽  
Wheat Yield ◽  
Nitrogen Management
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