A field experiment was conducted in rabi season, 2015-2016 in the organic block of Instructional-cum-Research Farm, Assam Agricultural University, Jorhat-13, to study the efficacy of bio-agents, organic amendment and clear plastic mulching in management of M. incognita in organic tomato. All treatments viz., clear plastic mulch of 0.75 mm density, vermin-compost, Trichoderma viride, mustard oil cake alone or in combination significantly increased plant growth parameters and yield of tomato over control. However maximum reduction of galls, egg masses per root system and final nematode population in soil was observed in the treatment with clear plastic mulch of 0.75 mm density + mustard oil cake @ 750 kg/ha over control.

The independent variables selected for this study were carboxy methyl cellulose (0.5-2.5%) as foam stabilizer, egg albumin (3-11%) as foaming agent, temperature (60-80ºC) and whipping time (6-12min). Foam were prepared by incorporating carboxy methyl cellulose and egg albumin into the puree, the foam were then dried in cabinet air drier and finally grinded into powder. The dependent variables measured were flowability time, solubility, hygroscopicity and degree of caking. The study shows that the minimum value of flowability time was 6.5 s and maximum value was 13.56 s. Solubility of banana powder ranges from 59.1 to 98.5%, hygroscopicity varied from 1.25 to 4% and degree of caking was in the range of 1.89 to 4.5 %.

A field experiment consisting of 2 fertility levels viz. 50 % of recommended dose of fertilizer (RDF) and 100 % RDF (20: 40: 20 kg ha-1 of N: P2O5: K2O); 2 row spacings (30 and 45 cm) and 3 genotypes (HG-100, HG-8-1 and HG-563(c)) was conducted at the Research Farm, College of Agriculture, Gwalior, India during kharif 2010 to find out their effects on grain, stover and grain-protein yield and production economics of cluster bean. The experiment was laid out in factorial randomized block design with 12 treatment combinations and 3 replications. The highest grain, stover and grain-protein yield could be recorded in 100 % RDF, 45 cm row spacing and HG-100 and that were significantly superior to other treatment combinations. Cluster bean genotype HG-100 sown at 45 cm row spacing with 100 % RDF appeared to be better combination for higher production and net return. However, to get maximum dividend in terms of the highest benefit: cost ratio, HG-100 sown at 45 cm row spacing with 50 % RDF was found to be economical.

Soil salinity, due to varying salt levels that occur in large terrestrial areas of the world severely affect crop yield. The present investigation was taken up to describe the potential biochemical and enzymatic responses in the leaves and roots of two rice cultivars CSR-23 (tolerant) and BPT- 5204 (sensitive) to different salt concentrations. Here, we observed significant changes in the biochemical and enzymatic responses between control and treatments as well as between the genotypes. The salt sensitive variety i.e. BPT 5204 exhibited high reducing sugar and total phenol contents, compared to salt tolerant variety CSR 23. Catalase activity was significantly higher in leaves (46 %) and roots (5.5 %) of CSR 23 compared to BPT 5204. CSR 23 also showed an elevated Superoxide dismutase (SOD) activity in leaves (45.5 %) and roots (12.4 %) compared to BPT 5204. Similarly, Glutathione Reductase increased in the leaves (85 %) and roots (91.5 %) of CSR 23 as compared to BPT 5204. Highest nitrate reductase activity was observed in leaves of CSR 23(48 %) compared to BPT 5204, whereas there was no significant change in case of roots. BPT 5204 showed significantly higher NiR activity in leaves (18.3 %) and roots (17.5 %) as compared to CSR23. BPT 5204 showed significantly higher Total chlorophyll content in leaves and decreased in CSR 23 (25 %). The salt-tolerant cultivar CSR23 resisted salinity stress due to its ability to surmount oxidative stress via up-regulation of anti-oxidative enzymes and nitrogen assimilating enzymatic activities.

Salinity of soil and water is serious arising problem in costal and arid region. Fluctuations in salt concentration of irrigation water effect on crop yield and also at different growth stages. Hence in the present research the influence of variable concentrations of irrigation water subjecting to groundnut and its effect was evaluated on ET, crop coefficient and yield response by undertaking a field experiment during 2015.Four different concentration of saline irrigation water mainly 2dSm-1(T1), 4dSm-1(T2), 8dSm-1(T3) and 12dSm-1(T4) applied to flowering stage (S2) and treatment was replicated four times. Observed that, increasing salinity will decrease crop yield, decrease crop coefficient and threshold irrigation water salinity level is 2dSm-1 for flowering stage. FAO approach failed to predict the concentration of irrigation water at which relative yield becomes zero accurately. The saline irrigation water at which yield become zero was estimated for flowering stage as per the procedure developed in the present study.