Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi

A field experiment was conducted at the Main Oilseeds Research Station, Junagadh Agricultural University, Junagadh (Gujarat) during kharif for three consecutive seasons of the year 2013-14, 2014-15 and 2015-16. The experiment was laid out in randomized block design, with four replications. The soil was medium black in texture. The seven treatments comprised oftwo levels of drip irrigation [at 0.6 and 0.8 Pan Evaporation Fraction (PEF)] with combination of three levels of nitrogen (50 %, 75 % and 100 % of recommended dose through fertigation) and check basin method of irrigation 0.6 IW/CPE ratio with IWof 50 mm. Drip system(4 LPH) was operated after every third day for 2 hours during October and for 1 hour and 45 minutes during November to January. The pooled analysis of results revealed that drip fertigation at 0.8 PEF in conjunction with nitrogen fertigation @ 90 kg/ha in the form of urea (20 kg as basal and 70kg in five equal split doses at 12 days interval) resulted in the highest seed yield (3541 kg/ha), net returns (Rs. 90712/ha) and B:C ratio (3.25). Drip fertigation also recorded saving of 25% nitrogen fertilizer and better water use efficiency. The highest water use efficiency of 12.26 kg/ha mmwas obtained under drip fertigation at 0.6 PEF +100% RDN (T3).

Effect of application of different biogas fertilizer on eggplant production: Analysis of fertilizer value and risk assessment

(pp. 25–32) The effectiveness of drip fertigation, which is known to control fertilizer application, for reducing nitrate in spinach and for improving the other qualities of spinach was investigated. Fertilizer application can be controlled effectively by drip fertigation. In 2002 and 2003, two spinach cultivars were grown in a plastic greenhouse with 4, 8 or 12 g N m−2 of fertilizer application by drip fertigation, and with 8, 12 or 16 g N m−2 of fertilizer application as a basal application. Nitrate concentration of petiole sap extracted by a garlic squeezer was significantly correlated with the water-extractable nitrate concentration. Nitrate concentrations of petiole sap extracted from plants treated with 12, 8 and 4 g N m−2 of fertilizer by drip fertigation were constant, gradually decreased and significantly decreased, respectively, during the last 2 weeks. When nitrate concentration decreased during the last week, nitrate concentration in spinach at harvest was less than 3,000 mg kg−1 FW. Thus it was thought that the pattern of the time course of nitrate in petiole xylem sap is a good indicator for getting spinach with low nitrate. The sugar concentration was negatively correlated with applied nitrogen quantity and the nitrate concentration. The total oxalic acid concentration in spinach treated by drip fertigation was significantly lower than that in spinach treated by basal application, independent of the amount of applied nitrogen. Thus drip fertigation is advantageous for improving crop quality.

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi (Japanese Journal of Soil Science and Plant Nutrition)

Drip fertigation sustains crop productivity while mitigating reactive nitrogen losses in Chinese agricultural systems: Evidence from a meta-analysis

Abstracts of Nippon Dojo-Hiryogaku Zasshi

Abstracts of Nippon Dojo-Hiryogaku Zasshi