M. V. Durai , P. K. Ralhan , R. Sharma , A. Singh , S. Chauhan

Abstract

The study was carried out at farmers fields to quantify nutrient harvest through biomass of pruned material of 2, 3, 4, 5 and 6 year old plantations and whole tree of Populus deltoides Bartr. (Poplar). The pruned biomass was 327.4, 426.96, 986.27, 1,234.91 and 1,558.59 kg ha^-1 at 2, 3, 4, 5 and 6 year old plantations respectively. The total biomass of branches, main stem and ischolar_main of poplar at exploitable age was 48,96, 89,144, 94,040 and 12,280 kg/ha, respectively. Nutrient concentration was increased from basal segment to terminal segment of pruned braches and decreased with size of the branches. The nutrient harvest through pruned biomass was 46.32 kg ha^-1 N, 6.92 kg ha^-1 P and 19.93 kg ha^-1 K whereas nutrient loss through whole tree was 652.8 kg ha^-1, 75.84 kg ha^-1 P and 719.84 kg ha^-1 K. As the nutrient is exceeded than annual return, additional doses of fertilizers may be required to maintain soil fertility and productivity of the system.

Keywords

Nutrient Harvest, Populus deltoides, Agri-Silviculture System, Punjab

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M. V. Durai

Abstract

The present study was conducted taking quality seeds of selected plus trees of Gmelina arborea in four different size of ischolar_main-trainers, viz., T1 (150cc), T2 (250cc), T3 (350cc) and T4 (500cc). Each ischolar_main-trainer size was treated as a separate treatment and each treatment replicated three times. Each replication had 10 seedlings of 3-leaf stage in uniform potting media. At the end of three months, four seedlings were selected randomly for measurement of growth parameters and biomass studies. Total seedling height, collar diameter, shoot biomass, ischolar_main biomass, tap ischolar_main length and number of lateral ischolar_mains were recorded. Sturdiness quotient, shootischolar_main ratio and seedling quality index were calculated. The results of the present study show that ischolar_main-trainer size had significant effect for all growth parameters. Treatment average difference for all growth parameters except number of leaves, which was maximum in T4 and minimum in T1 observed. The sturdiness and seedling quality have direct and positive relationship with ischolar_main-trainer size.

Keywords

Root Trainer, Seedling Quality, Gmelina, Growth

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M. V. Durai

Abstract

No abstract

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M. V. Durai

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M. V. Durai

Abstract

In a study of influences of biotic factors on the productivity of homegardens biotic factors were classified into three classes viz., complementary, supplementary and intervening factors. It is found that structure, composition, management and productivity of home gardens depend upon several interlinking socio-economic-cultural, ecological and policy and institutional factors. Intervening factors are the foremost deciding factor in the homegarden management system and its survival. Sustainability and stability of homegarden is ensured, when the positive effects are equal or higher than the negative effects of the system. The prevailing imbalance in the system is caused by dominance of intervening factor. Market price, government policy and labour issues play vital in creating imbalance in the system.

Keywords

Biotic Factors, Productivity, Agroforestry, Homegarden, Interaction, Responses

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M. V. Durai

Abstract

No Abstract

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M. V. Durai , S. Sankar

Abstract

Iterative filtering and generation method (IFGM) process was adopted for developing and testing criteria and indicators (C and I) for sustainability of homestead farming in Kerala. It includes three processes viz., Filter I, Filter II and Filter III. Two hundred and forty four candidate sets of C and I were screened from various sources with Filter I and were reclustered into four guiding principles viz., a) Farming community well-being is assured, b) People well-being is assured, c) Homestead farmings' landscape health is assured and d) External environment is supportive to sustainable home gardens. At the end of field testing, 201 C and I were screened, which were subjected to Filter III. At the end of third process of IFGM, 176 appropriate C and I were identified for sustainable management of homestead farming. The rd maximum number of C and I were encountered under 3^rd principle (homegardens' landscape health is assured) with 24 criteria and 68 indicators. At homestead management unit level, C and I may be used as a tool for monitoring direction of change towards/away from sustainability and undertaking corrective action.

Keywords

Agroforestry, Homegarden, Sustainable Management, Criteria, Indicators, Farming

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