scholarly journals Dependence of the number of potato minitubers on the method of planting micro-plants

2021 ◽  
Vol 677 (4) ◽  
pp. 042048
Author(s):  
S Filippova ◽  
L Eliseeva ◽  
E Turbina ◽  
M Prokopyeva ◽  
A Selivanov
Keyword(s):  
2018 ◽  
Vol 5 (01) ◽  
Author(s):  
ANIL KHIPPAL ◽  
KAMINI KUMARI S. Bhadauria ◽  
JASBIR SINGH

In Haryana (India) cotton is generally sown with conventional tillage practices witnesses poor germination and plant establishment. Poor plant stand is attributed by burning of emerging plants due to very high temperature at the time of planting, which is further worsen by crust formation due to pre-monsoon showers. Keeping these points in view, an experiment was conducted with farmers' participatory research mode in village Hajwana of Kaithal district. Cotton sown with zero tillage technique resulted in approximately five percent higher yield i.e. 136.3 kg ha-1 over conventional tillage. Mean returns over variable cost of all the three years were 10.8 percent i.e. Rs. 11794 ha-1 more in zero tillage over conventional tillage. Benefit: cost ratio were 3.86, 3.86 and 4.61 in conventional method of planting, bed planting and zero tillage technique, respectively. Zero tillage planting of cotton reduced fuel consumption by 93.4 % and 91.7 % compared to bed planting and conventional planting respectively.


2019 ◽  
Vol 18 (5) ◽  
pp. 146-153
Author(s):  
B. A. Ilyushin

Purpose. This article introduces three samples of spearheads of long-shafted weapons from the collection of the Nizhny Novgorod State Historical and Architectural Museum-Reserve (Nizhny Novgorod, Russia). Long-range weapons being of a certain scientific interest, the samples of spearheads considered are important as they have not been described yet. In the course of our research, we have analyzed the features of their design in order to clarify the origin and time of their creation. Results. Two spearheads from the collection of the Nizhny Novgorod State Historical and Architectural Museum-Reserve came from a private collection of A. O. Karelin (1837–1906), and the third one from the funds of the Museum of Lyskovo. Their origin in those collections is unknown; however, museum workers have managed to date them to the 17th century. All the spearheads considered are in a good condition, with barely noticeable spots of rust. Obviously, they have new shafts, two of which are broken. All spearheads were manufactured from iron; belong to the sleeved type according to the method of planting on the shaft and to the group of lenticular according to the cross-section of the pen. The pens of the spearheads are of two types – elongated rhombic and elongated triangular. The spearheads’ feathers are decorated with rows of holes along the edge and two curls (sprouts) below the shoulders. All the spearheads have another decorative element, a so called “apple” on the neck of the pen, which was not a mandatory element of this type of spearheads. The elongated rhombic pens belong to the spearheads from the collection of the museum in Lyskovo and Karelin’s collection (spearheads No. 1–2). The spearhead No. 1 (inventory number GOM 11943. IM 1512) has the total length of 28.4 cm; the blade is 11 cm long and 4.7 cm wide at most. The biggest diameter of the sleeves measures 3.8 cm with the length of 13.6 cm. The spearhead No. 2 (inventory number GOM 7274-13. OR 451) has the total length of 34 cm; the blade is 17 cm long and 5.4 cm wide at most. The biggest diameter of the sleeves measures 3.8 cm with the length of 12.4 cm. The elongated triangular pen is from Karelin’s collection. The spearhead No. 3 (inventory number GOM 7274-10.OR 382) has the total length of 37 cm; the blade is 28.5 cm long and 5.5 cm wide at most. The biggest diameter of the sleeves measures 3.8 cm with the length of 12.3 cm. Conclusion. Three previously unknown spearheads have been introduced into scientific circulation. The analysis of the design features of these weapons allowed us to date them to the 17th century. The spearheads are attributed to the type “rogatina”, which was widespread in the Russian state being massive and big. Such long-range weapons were known as “bear-spear” and initially were used for hunting large animals. Such items are widely found in the European part of Russia and in Siberia, where they were brought by Russian pioneers.


Author(s):  
Vera A. Savchenkova ◽  
◽  
Sergey B. Vasilyev ◽  
Vladimir F. Nikitin ◽  
Petr A. Aksenov ◽  
...  

Reduction of time for commercial wood cultivation and increasing the productivity of plantations is an urgent direction of scientific research considering supply of forest resources in the country and the growing need for timber. One of the ways of intensive forest reproduction is the creation of forest plantation crops. Plantation of forest crops involves the cultivation of technically valuable tree species in a shorter period of time. Our country has experience in the creation of forest plantation crops, but due to the reorganization in the forest industry, many areas were left without proper care. However, for 34 years research scientists at the Mytischi Branch of the Bauman Moscow State Technical University (formerly Moscow State Forest University) have been systematically monitoring the growth and development of spruce forest crops created in 1984 with intermediate agricultural use between the rows. The method of creating test crops is aimed at providing the most favorable conditions for growth and development of the main tree species in the first years after planting, the use of the natural growth of plantations during the entire period of crops cultivation, cost optimization for frequent silvicultural care, obtaining stands with high economic and aesthetic properties, prevention of wood defects. The article presents the technology of creating spruce crops, which is a distinctive feature of this method. We analyzed changes in the diameters and heights of trees grown by creating forest crops in the traditional way and with the use of intermediate agricultural use between the rows. The reliability of differences in the average values of independent samples was assessed, confirming the advantage of the spruce test crops. Their species composition is 100 % spruce, the absolute taper of which is 2.13 times less than those created by the traditional method. A higher probability of obtaining trunks with a volume of more than 0.02 m3 by creating test crops has been established. The results of statistical processing of experimental data indicate the prospects of the method of planting spruce forest crops with intermediate agricultural use between the rows, which contributes to the formation of high-quality stands.


Author(s):  
N. Swapna ◽  
T. Prabhakar Reddy ◽  
G. Rakesh ◽  
G. Eswara Reddy ◽  
P. Jalender Naik ◽  
...  

A field experiment was conducted at Regional Sugarcane and Rice Research Station, Rudrur, during 2018-19 to study the effect of plant density and nitrogen management for realizing higher cane yield under bud chip method of planting in sugarcane (Saccharum officinerum). The treatments were plant geometry and nitrogen doses with three and four splits of application in split plot design. The recommended dose of nitrogen was 250 kg N ha-1. Among the geometry, 150 x 60 cm spacing recorded significantly higher cane length which was statistically at par with 150 x 30 cm. 150% RDN (375 kg N ha-1) with four splits of application recorded significantly higher cane length. Among the split application of nitrogen, four splits with 150% RDN at basal, 60, 90 and 120 DAP recorded significantly higher number of tiller at 90 and 120 DAP. Significantly higher single cane weight was recorded in 150% RDN  with four splits of application in 150 x 60 cm. Significantly higher cane yield was recorded in 150% RDN with four splits of application in 150 x 60 cm spacing and was statistically at par with 150 x 30 cm spacing. This was followed by 100% RDN with four splits of application in 150 x 60 cm spacing.


Author(s):  
A.V. Ramanjaneyulu ◽  
K. Indudhar Reddy ◽  
P. Spandana Bhatt ◽  
T. L. Neelima ◽  
A. Srinivas

An experiment was conducted with the objective of understanding the response of pigeonpea varieties to N levels under different method of planting. It consisted of 16 treatments with four methods of planting in main plots, two varieties and two N levels in double split plot (DSP) design. The results of pooled data indicated that significantly higher plant population (50,683 ha-1) and seed yield (1255 kg ha-1) besides lower cost of cultivation (Rs. 27,875 ha-1), higher net returns (Rs. 33,698 ha-1) and B:C ratio (2.19) were recorded with normal planting (90x20 cm) compared to other planting methods. Transplanted pigeonpea (120x90 cm) had significantly higher stem girth (10.32 cm) and number of pods plant-1 (1483) besides on par seed yield (1100 kg ha-1) with that of normal planting. However, the yield improvement is not substantial to offset the additional costs involved in nursery raising and transplanting. Though the performance of transplanted pigeonpea (90x90 cm) and dibbling (90x90 cm) was similar with regard to seed yield, dibbling fared well with regard to net returns and B:C ratio. PRG-158 variety accrued an additional net returns of Rs. 2340 ha-1 over Asha, due to its short duration. N doses didn’t differ significantly in respect of growth parameters, yield attributes and yield. Thus, normal planting method (90x20 cm) with PRG-158 variety and 20 kg N ha-1 can be recommended on Alfisols under rainfed conditions.


Author(s):  
Hanamant M. Halli ◽  
S. S. Angadi

The main aim of land configurations is in situ conservation of soil moisture by increasing the opportunity time for augmented water use efficiency and drain out excess water. The field study was conducted for two years under rainfed conditions of Dharwad on residual soil moisture and fertility. Cowpea produced higher grain yield (13.4 q ha-1), haulm yield (25.6 q ha-1) and harvest index (34.4 %) with Broad Bed and Furrow (BBF) method of planting. Similarly, BBF method resulted in higher soil moisture content (32.09 % at 40 DAS) and rain water use efficiency (RWUE) of 5.96 kg ha-mm-1. The RWUE had a significant and highly positive correlation with soil moisture at 40 and 55 DAS (with r value of r=0.94** and r=0.96**, respectively). BBF method of planting also registered higher gross return (Rs.42725 ha-1), net return (¹ 27515 ha-1) and benefit-cost ratio (2.82). Cowpea can be grown successfully after summer maize on existing BBF configuration for higher yield and rain water use efficiency.


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