Predicted harvest time effects on switchgrass moisture content, nutrient concentration, yield, and profitability

2018 ◽  
Vol 108 ◽  
pp. 74-89 ◽  
Author(s):  
Karen R. Lindsay ◽  
Michael P. Popp ◽  
Charles P. West ◽  
Amanda J. Ashworth ◽  
Alexandre Caldeira Rocateli ◽  
...  
Keyword(s):  
Moisture Content ◽  
Nutrient Concentration ◽  
Harvest Time ◽  
Time Effects

Composition and diversity of fungi on decaying logs in a New Zealand temperate beech (Nothofagus) forest

2000 ◽  
Vol 30 (7) ◽  
pp. 1025-1033 ◽  
Author(s):  
Robert B Allen ◽  
Peter K Buchanan ◽  
Peter W Clinton ◽  
Angela J Cone
Keyword(s):  
New Zealand ◽  
Moisture Content ◽  
Habitat Heterogeneity ◽  
Nutrient Concentration ◽  
Brown Rot ◽  
Brown Rot Fungi ◽  
Early Stages ◽  
Cation Concentration ◽  
Nothofagus Forest ◽  
Dominant Pattern

Saprobic fungal taxa on decomposing mountain beech (Nothofagus solandri var. cliffortioides (Hook. f.) Poole) logs were investigated in relation to properties of logs including stage of decay, size, nutrient concentration, and moisture content. We also determined whether logs become increasingly heterogeneous in nutrient concentration and moisture content with decay and also whether log heterogeneity related to fungal taxa diversity. Sporocarps were collected from the same 75 logs in spring (November 1995, 80 taxa) and autumn (May 1996, 151 taxa). For both seasons the dominant pattern in fungal taxa composition was only weakly related to measured properties of logs; however, a secondary pattern was found related to a fungal taxa succession reflecting stage of decay. In the autumn collection, Biscogniauxia capnodes (Berk.) Y.-M. Ju & J.D. Rogers and Schizopora nothofagi (G. Cunn.) P.K. Buchanan & Ryvarden occurred on small logs in the early stages of decay, with relatively low N. Decayed logs, with relatively high N, were characterized by Marasmius otagensis G. Stev. and Athelia epiphylla Pers. Our observations were not consistent with previously described successional trends from soft- to white- and brown-rot fungi as logs decay. The number of fungal taxa increased with log volume, and, additionally for the autumn collection, with heterogeneity in cation concentration suggesting habitat heterogeneity may be a factor in explaining log fungal taxa diversity.

Relationships among growing degree-days, tenderness, other harvest attributes and market value of processing pea (Pisum sativum L.) cultivars grown in Quebec

2006 ◽  
Vol 86 (2) ◽  
pp. 525-537 ◽  
Author(s):  
Edith Fallon, Nicolas Tremblay ◽  
Yves Desjardins
Keyword(s):  
Moisture Content ◽  
Size Distribution ◽  
Seed Size ◽  
Growing Degree Days ◽  
Harvest Time ◽  
Degree Days ◽  
Fresh Matter ◽  
Yield And Quality ◽  
Grain Moisture ◽  
The Relationship

In Quebec, grower income from processing peas is a function of yield and tenderometer reading. If peas are harvested early, the yield is poor, but the overall quality is superior, as indicated by lower tenderometer readings. Later harvests result in g reater yields but reduced quality (higher tenderometer readings). A better understanding of the relationship between harvest time, yield and quality is needed. In this study, the relationships between yield, tenderometer readings, size distribution and grain moisture content were examined as a function of growing degree-days (GDD) and production year for pea cultivars of different seed size categories. Yield and harvest attributes (tenderometer readings, seed size distribution and moisture content) were highly season dependent and their rates of change over the course of the harvest period also varied with the cultivar and year. Quality declined rapidly once the crop reached optimal maturity, while yield increased in a less predictable manner. Consequently, it was difficult to identify a harvest time that would consistently maximize grower returns. The highest income was generally not obtained at the optimal tenderometer readings presently used by the industry. Key words: Maturity, harvest date, climate, fresh matter yield, tenderometer, pea size

scholarly journals The Relationship Between the Moisture Content of Sweetcorn Raw Material and the Quality of the Deep-Frozen End Product

2003 ◽  
pp. 135-139
Author(s):  
Éva Kállai
Keyword(s):  
Moisture Content ◽  
Sweet Corn ◽  
Eating Habits ◽  
Great Part ◽  
Raw Material ◽  
Harvest Time ◽  
Foreign Matter ◽  
Physical Quality ◽  
The Relationship

One of the remarkable effects of the economical and social development is the changing of the eating habits, first of all increasing consumption of deep-frozen products. The spreading of the sweet corn under these vegetables is characteristic.The parameters exerting influence on the quality of the deepfrozen sweetcorn is classed in 3 categories:• Physical quality: foreign matter, clumps, blemished corn, broken kernel, miscut, pulled kernel.• Organoleptical features: taste, colour, texture, and sweetness.• Microbiological features: TVC, mould, yeast.The moisture content of the raw material influences the organoleptical features to the highest degree.We take continuously samples from the raw material arriving in to the factory to determinate moisture content, and from the product to specify the organoleptical features.Based on the data of 2002 we can make the following findings:The colour of the deepfrozen sweetcorn is less influenced by the moisture content. The taste is between 69% and 72% the most optimal, but over 72% get worse, more „milky”, water-tasted because of the underdevelopment of sweetcorn. The texture continuously becomes better with the increasing of moisture content. Under 67% of water the class „C” is typical, which means a taste with weak charasteric, a bit scathing or bitter, and texture with rubbery inner part and hard pericarpia. The decadence of taste is caused by converting a great part of sugar into starch.The correlation between moisture and quality is varying by varieties; different varieties have their best quality by different moisture content. By our investigations the best harvest time is at the 69-72% moisture content. At this point are the organoleptical features the most optimal, and the grower has not the loss of yield caused by early harvesting.

Development of Prediction Model for Harvest Moisture Content of Rough Rice Using Meteorological Data and Color Characteristics

2021 ◽  
Vol 37 (6) ◽  
pp. 1063-1071
Author(s):  
Hoon Kim ◽  
Oui Woung Kim ◽  
Jae Woong Han ◽  
Hyo-Jai Lee
Keyword(s):  
Moisture Content ◽  
Prediction Model ◽  
Meteorological Data ◽  
Coefficient Of Determination ◽  
Harvest Time ◽  
Leaf Color ◽  
Rough Rice ◽  
Accumulated Temperature ◽  
Harvest Moisture

HighlightsMoisture content, meteorological data, and leaf color characteristics of rice were investigated by harvest time.The moisture content decreased, and leaf color value increased as days after heading passed.Harvest moisture content prediction models were developed using meteorological data and leaf color.It is necessary to use both leaf color and meteorological data to determine the harvest time.Abstract.In this study, ambient temperature, accumulated temperature, and rice leaf color values were measured before harvest time to develop models for predicting the harvest moisture content (HMC) of short-grain rice. Field tests were conducted on Chuchung and Whang-gum-nu-ri, which are short-grain rice cultivars, at different experimental plots, for four years. As days after heading (DAH) passed, the moisture content (MC) decreased, and leaf color (L*, a*, and b* values) tended to increase. An experimental model that can predict HMC was developed based on the experimental results of 3 years, and the experimental results of the remaining 1 year were used for verification. The coefficient of determination of the HMC prediction model that used ambient and accumulated temperatures was 0.719, and that of the prediction model that used leaf color was as low as 0.418. However, the coefficient of determination of the integrated model that used all the factors, i.e. ambient and accumulated temperatures and leaf color, was as high as 0.915. Therefore, to determine the harvest time using the HMC of rough rice, leaf color, and meteorological data should be used together. Leaf color tended to increase markedly as the DAH increased, but the leaf color values were not similar for the same MC each year. This is because leaf color is influenced not only by MC but also by various cultivation factors such as soil conditions and growth rate during the rice cultivation process. Keywords: Accumulated temperature, Harvest, Harvest moisture content, Leaf color, Rice, Short variety.

scholarly journals An Optimal Management Strategy of Carbon Forestry with a Stochastic Price

2018 ◽  
Vol 10 (9) ◽  
pp. 3290
Author(s):  
Sora Yoo ◽  
Yong-sung Cho ◽  
Hojeong Park
Keyword(s):  
Management Strategy ◽  
Profit Maximization ◽  
Maximization Problem ◽  
Forest Owner ◽  
Optimal Management ◽  
Harvest Time ◽  
Time Effects ◽  
Carbon Forestry ◽  
Optimal Harvest ◽  
Successful Establishment

An analysis for the value of carbon forestry needs to be provided for the successful establishment of the carbon offset market in Korea. We present an optimal management strategy for a forest owner who participates in the offset market. Given a stochastic process of the timber price following a geometric Brownian motion, the profit maximization problem of the forest owner is solved. The model finds an optimal harvest time in the presence of the carbon and timber revenues with opposing time effects. Sensitivity analysis is performed with respect to the volatility rate of the timber price and the discount rate. The presented model is applied to the study of the Korean larch case to identify the threshold timber price above which it is optimal to harvest trees.

EFFECT OF HARVEST TIME AND DRYING METHOD ON YIELD, QUALITY AND GRADE CHARACTERISTICS OF BARLEY IN NORTHWEST ALBERTA

1985 ◽  
Vol 65 (1) ◽  
pp. 41-46
Author(s):  
J. V. CHRISTENSEN ◽  
W. G. LEGGE
Keyword(s):  
Hordeum Vulgare ◽  
Moisture Content ◽  
Field Experiments ◽  
Kernel Weight ◽  
Test Weight ◽  
Harvest Time ◽  
Drying Method ◽  
Hordeum Vulgare L ◽  
Phosphorous Content ◽  
Yield Quality

Field experiments with three barley (Hordeum vulgare L.) cultivars, Olli, Bonanza and Klages, were conducted for 3 yr at Beaverlodge, Alberta to determine the effect of harvest time and drying method on yield and quality. Plots were harvested at 5% kernel moisture content (KMC) intervals in the range of 45–15% and dried in the windrow or artificially dried. Yield, test weight, 1000-kernel weight, germination percent, protein content, phosphorous content and commercial grade were determined. Protein and phosphorous content were unaffected by the treatments. Windrowing at 40% KMC or less had little effect on yield or quality characteristics while threshing and artificially drying barley above 20% KMC reduced test weight and germination. Windrowing reduced yields of Olli and Klages barley by up to 19% compared to direct combining. Most treatments received feed grades, but the crop was most likely to meet Canada Western grades when windrowed at 30% KMC or less under favourable harvest conditions.Key words: Hordeum vulgare L., kernel moisture content, yield, quality

Harvest Time Effects on Yield, Quality and Aroma of Fragrant Rice

2021 ◽  
Author(s):  
Jisheng Zhang ◽  
Tianyi Tong ◽  
Pouwedeou Mouloumdema Potcho ◽  
Lin Li ◽  
Suihua Huang ◽  
...  
Keyword(s):  
Harvest Time ◽  
Time Effects ◽  
Fragrant Rice ◽  
Yield Quality
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